#include <iostream>
#include <vector>
using namespace std;
const int N = 10;
struct node
{
    int a, b;
    string s;
};

void print(vector<int>& a)
{
    for(int i = 0;i < a.size();i++)
    {
        cout << a[i] << " ";
    }

    cout << endl;
}

int main()
{
    // 创建一个空的 vector
    vector<int> a1;
    vector<int> a2(N);
    vector<int> a3(N, 1);

    vector<node> a4(N);
    vector<vector<int>> a5(N);

    vector<int> a6[N]; // 二维

    print(a2);
    print(a3);

    if(a2.empty()) cout << "空" <<endl;
    else cout << "非空" << endl;
}